/*
 * Copyright (c) 2012-2018 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.ide.actions;

import static java.util.Collections.singletonList;
import static org.eclipse.che.api.promises.client.callback.CallbackPromiseHelper.createFromCallback;
import static org.eclipse.che.ide.part.perspectives.project.ProjectPerspective.PROJECT_PERSPECTIVE_ID;

import com.google.gwt.core.client.Callback;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import javax.validation.constraints.NotNull;
import org.eclipse.che.api.promises.client.Promise;
import org.eclipse.che.api.promises.client.callback.CallbackPromiseHelper;
import org.eclipse.che.api.promises.client.js.JsPromiseError;
import org.eclipse.che.api.promises.client.js.Promises;
import org.eclipse.che.ide.CoreLocalizationConstant;
import org.eclipse.che.ide.Resources;
import org.eclipse.che.ide.api.action.AbstractPerspectiveAction;
import org.eclipse.che.ide.api.action.ActionEvent;
import org.eclipse.che.ide.api.action.PromisableAction;
import org.eclipse.che.ide.api.app.AppContext;
import org.eclipse.che.ide.part.explorer.project.ProjectExplorerPresenter;

/**
 * Action for showing/hiding hidden files.
 *
 * @author Artem Zatsarynnyi
 * @author Dmitry Shnurenko
 */
@Singleton
public class ShowHiddenFilesAction extends AbstractPerspectiveAction implements PromisableAction {

  public static final String SHOW_HIDDEN_FILES_PARAM_ID = "showHiddenFiles";
  private final AppContext appContext;
  private final ProjectExplorerPresenter projectExplorerPresenter;

  @Inject
  public ShowHiddenFilesAction(
      AppContext appContext,
      CoreLocalizationConstant localizationConstant,
      ProjectExplorerPresenter projectExplorerPresenter,
      Resources resources) {
    super(
        singletonList(PROJECT_PERSPECTIVE_ID),
        localizationConstant.actionShowHiddenFilesTitle(),
        localizationConstant.actionShowHiddenFilesDescription(),
        resources.showHiddenFiles());
    this.appContext = appContext;
    this.projectExplorerPresenter = projectExplorerPresenter;
  }

  @Override
  public void updateInPerspective(@NotNull ActionEvent event) {
    event.getPresentation().setVisible(appContext.getRootProject() != null);
  }

  @Override
  public void actionPerformed(ActionEvent e) {
    boolean isShow = projectExplorerPresenter.isShowHiddenFiles();
    projectExplorerPresenter.showHiddenFiles(!isShow);
  }

  @Override
  public Promise<Void> promise(final ActionEvent event) {
    if (event.getParameters() == null
        || event.getParameters().get(SHOW_HIDDEN_FILES_PARAM_ID) == null) {
      return Promises.reject(
          JsPromiseError.create(
              "Mandatory parameter" + SHOW_HIDDEN_FILES_PARAM_ID + " is not specified"));
    }

    final String showHiddenFilesKey = event.getParameters().get(SHOW_HIDDEN_FILES_PARAM_ID);
    final boolean isShowHiddenFiles = Boolean.valueOf(showHiddenFilesKey);

    final CallbackPromiseHelper.Call<Void, Throwable> call =
        new CallbackPromiseHelper.Call<Void, Throwable>() {

          @Override
          public void makeCall(final Callback<Void, Throwable> callback) {
            projectExplorerPresenter.showHiddenFiles(isShowHiddenFiles);

            callback.onSuccess(null);
          }
        };

    return createFromCallback(call);
  }
}
